RADEON_GEN_INT_CNTL
int_cntl = INREG( ai->regs, RADEON_GEN_INT_CNTL );
OUTREG( ai->regs, RADEON_GEN_INT_CNTL, int_cntl );
OUTREGP( di->regs, RADEON_GEN_INT_CNTL, RADEON_VIDDMA_MASK, ~RADEON_VIDDMA_MASK );
int_status = full_int_status & INREG(regs, RADEON_GEN_INT_CNTL);
OUTREG(di->regs, RADEON_GEN_INT_CNTL, 0);